Exactly. Even the worst teams are going to win 1 out of 3 games over the course of the season.
There’s a site called mlbsweeps.com. In data going back to 1961, only 27.04% of all 3 game series over that time frame have been sweeps. Heck, only 51% of 2 game sets are sweeps.
Bottom line, sweeping a team, any team, ain’t easy.